// import 'babel-polyfill' // 使用babel-polyfill垫片转换es6 api
import './polyfilltest.css'
let func = () => {};
const NUM = 45;
let arr = [1, 2, 4];
let arrB = arr.map(item => item * 2);
console.log(arrB.includes(8));
console.log("new Set(arrB) is ", new Set(arrB));
